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Single-dotted Wave
Idaea dimidiata (Hufnagel, 1767)
Geometridae: Sterrhinae
1708 / 70.011
Photo © Dave Foot

Similar Dorset Species
Treble Brown Spot
Idaea trigeminata
Forewing: 9-11mm
Flight: June - August
Foodplant:   Cow parsley, Burnet-saxifrage, Hedge bedstraw
Red List: Least Concern (LC)
GB Status: Common
Verification Grade:  Adult: 1

Davey, P., 2009: A generally distributed species in Britain apart from northern Scotland, the larva feeding on the withered, decaying or mouldy leaves of, amongst others, burnet saxifrage (Pimpinella saxifraga), hedge bedstraw (Galium mollugo) and cow parsley (Anthriscus sylvestris). In Dorset, the moth is particularly common on unimproved grassland on chalky soil inland such as on the Purbeck Ridge, and on coastal grassland, notably on Portland. It is least frequent on sandy soils. The extended three plus month flight period suggests two overlapping broods.

Recorded in 41 (103%) of 40 10k Squares.
First Recorded in 1930.
Last Recorded in 2019.
(Data up to end 2019)

Latest 5 Records (Data up to end 2019)
Date#VC10k Area
21/09/201919SY49 - Bridport
12/09/201919SY99 - Lytchett Matravers
02/09/201919SY39 - Lyme Regis
02/09/201919SY79 - Puddletown
31/08/2019+9SY58 - Abbotsbury
Further info: Idaea dimidiata
 
UK Moths
Mothdissection UK
Lepiforum.de Dorset Moths (Full)
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